From: Josh Boyer <jwboyer@fedoraproject.org>
Date: Fri, 20 Jun 2014 12:53:24 +0000 (-0400)
Subject: hibernate: Disable when securelevel is set
X-Git-Tag: archive/raspbian/4.9.82-1+deb9u3+rpi1_jessie~10^2~37
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=e9dac2438af9887597c05e58e6368ab5e263f972;p=linux-4.9.git

hibernate: Disable when securelevel is set

There is currently no way to verify the resume image when returning
from hibernate.  This might compromise the securelevel trust model,
so until we can work with signed hibernate images we disable it in
a secure modules environment.

Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>

Gbp-Pq: Topic features/all/securelevel
Gbp-Pq: Name hibernate-disable-when-securelevel-is-set.patch
---

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index b26dbc48c75b..1bbf952f586f 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -29,6 +29,7 @@
 #include <linux/ctype.h>
 #include <linux/genhd.h>
 #include <linux/ktime.h>
+#include <linux/security.h>
 #include <trace/events/power.h>
 
 #include "power.h"
@@ -67,7 +68,7 @@ static const struct platform_hibernation_ops *hibernation_ops;
 
 bool hibernation_available(void)
 {
-	return (nohibernate == 0);
+	return ((nohibernate == 0) && (get_securelevel() <= 0));
 }
 
 /**